escalating confrontation between Russia and the U.S. Over Ukraine. Russian president Vladimir Putin is defying international criticism and declaring that R Wil take over crimea which is Ukrainian territory. ABC's Jon Karl has the latest and joins us from the white house. God orni- goomorning. Wi be more sanctions against russian-backed security forces stormed a Ukrainian naval base in crimea as Russia is just tightening its grip on the region making it clear they have backin eanwe pr bi in the region reassuring Russia's nervous neighbors that the United States will protect them if Russia proceeds further. And, Jonathan, in talking about this and there have been many people that are weighing in and even Hillary Clinton now with some harsh words. Reporter: That's right. Ominous words from Hillary Clinton yesterday in Montreal. She warned that there could be another cold war. She said she doesn't want to see that. Nobody wants that to happen but it is primarily up to Vladimir Putin and, robin, she also had criticism of the United States' policy saying we should be doing more to help Ukraine. Now to that deadly helicopter crash hitting very close to home

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Vladimir Putin Moves Closer to Annexing Crimea

Russian president considers sanctions targeting U.S. officials.

Russian President Putin Expands Borders With the Annexation of Crimea

Vice President Biden says "the world has seen through Russia's action and has rejected the flawed logic behind those actions."

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